chore: replace travis with github action;

- Related: #20

.github/FUNDING.yml

@@ -0,0 +1 @@
+github: lukeed

.github/workflows/ci.yml

@@ -0,0 +1,39 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    name: Node.js v${{ matrix.nodejs }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        nodejs: [8, 10, 12, 14]
+    steps:
+    - uses: actions/checkout@v2
+    - uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.nodejs }}
+
+    - name: Install
+      run: npm install
+
+    - name: (coverage) Install
+      if: matrix.nodejs >= 14
+      run: npm install -g c8
+
+    - name: Test
+      run: npm test
+      if: matrix.nodejs < 14
+
+    - name: (coverage) Test
+      run: c8 --include=src npm test
+      if: matrix.nodejs >= 14
+
+    - name: (coverage) Report
+      if: matrix.nodejs >= 14
+      run: |
+        c8 report --reporter=text-lcov > coverage.lcov
+        bash <(curl -s https://codecov.io/bash)
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

readme.md

@@ -1,4 +1,4 @@
-# dset [![Build Status](https://travis-ci.org/lukeed/dset.svg?branch=master)](https://travis-ci.org/lukeed/dset)
+# dset [![CI](https://github.com/lukeed/dset/workflows/CI/badge.svg)](https://github.com/lukeed/dset/actions?query=workflow%3ACI) [![codecov](https://badgen.net/codecov/c/github/lukeed/dset)](https://codecov.io/gh/lukeed/dset)
 
 > A tiny (160B) utility for safely writing deep Object values~!